Head Bolts and Exhaust Manifold Studs

I reuse them and never had an issue. The modern mopar manuals say to not reuse them but they use inferior bolts nowdays compared to the old stuff. I have some spare washers and etc from a /6 I tossed let me know if you need anything. I don't know why the used 2 different threads on 1 bolt and I don't see why you can't just use a coarse bolt and be done with it. I'd check bolt depth in the head and figure out what length you need from there if you choose that route.